Risk Assessment of Basis of Free Metallic Particles in GIS Based on Ultrasonic Signal

LI Da-jian1; YANG Jing-gang2; MI Chu-ming3; WU Lei4; LI Yan-ming4

doi:10.13296/j.1001-1609.hva.2010.01.017

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Risk Assessment of Basis of Free Metallic Particles in GIS Based on Ultrasonic Signal

更新时间：2025-04-26

- Risk Assessment of Basis of Free Metallic Particles in GIS Based on Ultrasonic Signal
- High VoltageApparatus Vol. 46, Issue 1, Pages: 53-57(2010)
- 作者机构：
  
  1. 广西电网公司电力科学研究院
  2. 江苏电力试验研究院
  3. 西安科技大学能源学院
  4. 西安交通大学电气工程学院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2010.01.017
  CLC： TM595
- Published：2010
- 稿件说明：
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[1]黎大健,杨景刚,米楚明,吴磊,李彦明.基于超声波信号的GIS内自由金属颗粒危险评估研究[J].高压电器,2010,46(01):53-57.

LI Da-jian1, YANG Jing-gang2, MI Chu-ming3, et al. Risk Assessment of Basis of Free Metallic Particles in GIS Based on Ultrasonic Signal[J]. High voltageapparatus, 2010, 46(1): 53-57.
[1]黎大健,杨景刚,米楚明,吴磊,李彦明.基于超声波信号的GIS内自由金属颗粒危险评估研究[J].高压电器,2010,46(01):53-57. DOI： 10.13296/j.1001-1609.hva.2010.01.017.

LI Da-jian1, YANG Jing-gang2, MI Chu-ming3, et al. Risk Assessment of Basis of Free Metallic Particles in GIS Based on Ultrasonic Signal[J]. High voltageapparatus, 2010, 46(1): 53-57. DOI： 10.13296/j.1001-1609.hva.2010.01.017.

摘要

为了研究GIS腔体内自由运动金属颗粒对GIS绝缘劣化的危险程度

设计了一个模拟此类缺陷的模型

并测量了不同尺寸和形状的自由运动颗粒产生的超声波信号

最后分析了这些信号的工频相位相关性、幅值以及飞行时间等几个要素的特性

并根据这些要素评估金属颗粒的危险程度。结果表明:颗粒静止不动发生放电时

超声波信号幅值较小且有较强的相位相关性

而当颗粒自由跳动时

信号幅值非常大且相位相关性较弱

颗粒的尺寸和形状会影响颗粒的飞行时间

与球状颗粒相比

丝状颗粒的飞行时间随电压的升高有更显著的变化

因此它们对GIS绝缘劣化的影响严重度不一样

并且这些信号的幅值、飞行时间的变化分布具有周期性。

Abstract

To investigate the risk of free metallic particles in gas insulated switchgear（GIS） chamber

a test cell is designed for simulation.Ultrasonic signals generated by the free particles with different shape and size are detected to extract the feature parameters such as power frequency phase correlation

amplitude and flight time.Then the harm of the particles is analyzed based on these parameters.The experimental results show that the ultrasonic signals of partial discharges are weak and have strong phase correlation when the particles are static in the cell

and the signals become strong and have weak phase correlation when the particles dance.And the results also show that the flight time varies with the particles’ shape and size

and the flight time of cylindrical particles is more sensitive to the test voltage than that of the spherical particles.This study indicates that different particles impose different harm to the insulation of GIS.Moreover

the signal amplitude and particles flight time are periodical.

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